i've been using the Mark III for a couple of days now and what can i say? i'm impressed. coming from the E-P2 where ISO400 is the highest i would use for color, the Mark III's high ISO performance is extremely liberating!! and i find the Mark III's noise much more pleasing, even at ridiculously high ISOs. i have even found myself opting for higher ISOs than necessary just to get noise/grain for b&w, i like it so much.
using the camera has been a joy. i really love the viewfinder and am getting used to the controls. there are way more buttons and dials on this camera than i am used to, but that's a plus rather than a negative since it means hardly any diving into menus.
about the viewfinder, i cant compare it to the Mark II's standard screen or the Eg-S, but so far I have found it to be fine manually focusing my Zuiko 55mm 1.2 wide open and stopped down a bit (depending on the lighting). the viewfinder is wonderfully bright (esp. at 1.2) and DOF is easy to see. i can see it being harder to focus ultra-wides where the subject is not close, but that's a problem for just about any viewfinder/screen.
there is one thing that
MUST be noted for those who want to use old lenses via adapters with AF chips. while these adapters have worked fine on the Mark II, not all of them will work on the Mark III. when I put my Zuiko 55mm via AF adapter (which I have used on my 350D and is known to work on the Mark II) the Mark III refused to do anything. it displayed a message about the lens needing a firmware update and wouldn't turn on at all beyond that. i was on a train at the time & quickly googled to see if anyone else had had this problem and found one person had. i pried the AF chip off with a pen and voilà! it worked. i will miss the AF confirmation, especially with the Mark III's awesome 61points, but oh well.
the biggest (and only) let down that i have at the moment is the lack of software support and the fact that Canon's own software, DPP,
cant even seem to process the Mark III's RAWs right. if i export to 16bit TIFF it seems ok, but that results in massive files. sigh. i cant wait until postprocessing the files becomes easier.
anyway, here are a couple of photos i've taken. please note that they are NOT representative of what this camera can do. i am not a pro and am still learning this camera and photography. the photos have been edited to my own taste and EXIF + larger versions can be found on Flickr. RAWs available upon request.
half of Me by
nighstar, on Flickr
golden ouchies by
nighstar, on Flickr
CBD tones by
nighstar, on Flickr